find out the food chain with longest length among all food chains that are linked to a given species

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Description

Sometimes the longest chain is not unique, thus will return all candidates with longest length

Usage

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longest.chain(gemat, sp)

Arguments

gemat

standard square graph matrix

sp

the node/species you want to search

Author(s)

Youhua Chen <haydi@126.com>

References

Chen Y (2012) loop: an R package for performing decomposition of weighted directed graphs, food web analysis and flexible network plotting. Submitted.

See Also

shortest.chain, largest.weight, smallest.weight, lclw

Examples

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#mat=matrix(c(0,5,3,7,0,5,0,8,0,4,3,8,0,1,6,7,0,1,0,2,0,4,6,2,0),5,5)
#search for species 3
#lclw(gemat=mat,sp=3)
#longest chain isn't necessary to have largest weights
#largest.weight(gemat=mat,sp=3)
#longest.chain(gemat=mat,sp=3)

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